Nyalox 4 in. 240 Fine Grit Flap Brush is for sanding or polishing unfinished and rough wood surfaces. This versatile brush excels at rounding and blending cutouts on both metal and wood, providing a smooth and refined finish. Its durable nylon bristles are impregnated with aluminum oxide, ensuring effective abrasion without gouging the material. Designed with a convenient 1/4" shank, it fits most standard power tools for ease of use and efficiency. Model Number: 7200039